Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb16557bd7fc165…

MALICIOUS

PDF

31.6 KB Created: 2020-06-02 18:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4d2810c5a64fd62fedd74185da78563 SHA-1: ad5fe67584abd1b4aa88a1b848c9511b2d985f39 SHA-256: fbb16557bd7fc1659246640df200e03c762e85ed32fc68f6e6a8a6a467d16b6f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm designed for SEO manipulation. One of the embedded URLs, 'http://peakperformancejourneys.com/uploads/1/3/0/8/130874585/130874585.html#adobe+photoshop+elements+9+serial+number', indicates a lure related to software piracy. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the structure and embedded URLs point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://peakperformancejourneys.com/uploads/1/3/0/8/130874585/130874585.html#adobe+photoshop+elements+9+serial+number
    • http://lawofficebonilla.com/uploads/1/3/0/2/130289355/1d08dcdd1.pdf
    • http://madererialacima.net/uploads/1/3/0/2/130288522/9845482.pdf
    • http://asassaude.org/uploads/1/3/0/8/130874439/514ff260.pdf
    • http://imirislewis.com/uploads/1/3/0/6/130621055/9657795.pdf
    • http://hostmaster.pwrrtigers.com/uploads/1/3/0/7/130776206/voditijuvije_jowibajumixam_gafij.pdf
    • http://stetsonoperaproject.com/uploads/1/3/0/4/130476896/1da877be2.pdf
    • http://peakperformancejourneys.com/uploads/1/3/0/8/130874585/terms.html
    • http://peakperformancejourneys.com/uploads/1/3/0/8/130874585/dmca.html
    • http://peakperformancejourneys.com/uploads/1/3/0/8/130874585/policy.html
    • https://porugisi.files.wordpress.com/2020/05/warewesigejekuguparaxu.pdf
    • https://masobovixapa.files.wordpress.com/2020/05/11464548237.pdf
    • https://woxonoxemu.files.wordpress.com/2020/05/99942700985.pdf
    • https://nikiruweti.files.wordpress.com/2020/05/dilovevini.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f74.bin
0e22dcbe5481e04af0c54edf42abcb86e30b3b532cea87677939ef8e8e2dec40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F74 10540 bytes

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